I believe that the location of someone's death still carries their energies. The energies that were left behind when the physical body perished. This is why, I believe, you can be walking around and suddenly feel your emotions being shifted in various directions. You're influenced by the energies that you've encountered.
Yes theoretically a persons energy still might remain behind after their death and infuse a place or object. Especially if the person was very attached to the said place or object. Also if the death was particularly violent or traumatic. This is how psychics get feelings about places ect. The psychic is connecting to or touching the energy left behind by a person ect.